netdev - [PATCH 21/53] netfilter: nf_nat: Fix return NF_DROP in nfnetlink_parse_nat

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Date:   Mon,  1 May 2017 12:46:48 +0200
From:   Pablo Neira Ayuso <pablo@...filter.org>
To:     netfilter-devel@...r.kernel.org
Cc:     davem@...emloft.net, netdev@...r.kernel.org
Subject: [PATCH 21/53] netfilter: nf_nat: Fix return NF_DROP in nfnetlink_parse_nat_setup

From: Gao Feng <fgao@...ai8.com>

The __nf_nat_alloc_null_binding invokes nf_nat_setup_info which may
return NF_DROP when memory is exhausted, so convert NF_DROP to -ENOMEM
to make ctnetlink happy. Or ctnetlink_setup_nat treats it as a success
when one error NF_DROP happens actully.

Signed-off-by: Gao Feng <fgao@...ai8.com>
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
---
 net/netfilter/nf_nat_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/netfilter/nf_nat_core.c b/net/netfilter/nf_nat_core.c
index fb0e65411785..5e35643da650 100644
--- a/net/netfilter/nf_nat_core.c
+++ b/net/netfilter/nf_nat_core.c
@@ -806,7 +806,7 @@ nfnetlink_parse_nat_setup(struct nf_conn *ct,
 
 	/* No NAT information has been passed, allocate the null-binding */
 	if (attr == NULL)
-		return __nf_nat_alloc_null_binding(ct, manip);
+		return __nf_nat_alloc_null_binding(ct, manip) == NF_DROP ? -ENOMEM : 0;
 
 	err = nfnetlink_parse_nat(attr, ct, &range, l3proto);
 	if (err < 0)
-- 
2.1.4